/ J. Lloyd, N. Tchebakova, O. Shibistova // Tellus. Series B: Chemical and physical meteorology. - 2002. - Vol. 54B, № 5. - С. 749-767
Аннотация: Using light aircraft and at intervals of approximately 14 days, vertical profiles of temperature, humidity, CO2 concentration and C-13/C-12 and O-18/O-16 ratio, as well as concentrations of CH4, CO, H-2 and N2O, from about 80 to 3000 m above ground level have been determined for the atmosphere above a flux measurement tower located near the village of Zotino in central Siberia (60degrees45'N, 89degrees23'E). As well as being determined from flask measurements (typically at heights of 100, 500, 1000, 1500, 2000, 2500 and 3000 m) continuous CO2 concentration profiles at 1 Hz have also been obtained using an infrared gas analyser. This measurement program is ongoing and has been in existence since July 1998. Data to November 2000 are presented and show a seasonal cycle for CO2 concentration of about 25 mumol mol(-1) within the atmospheric boundary layer (ABL) and about 15 mumol mol(-1) in the free troposphere. Marked seasonal cycles in the isotopic compositions Of CO2 are also observed, with that of oxygen-18 in CO2 being unusual: always being depleted in the ABL with respect to the free troposphere above. This is irrespective of whether the CO2 concentration is higher or lower in the free troposphere. We interpret this as indicating a net negative discrimination being associated with the net terrestrial carbon exchange, irrespective of whether photosynthesis or respiration dominates the net carbon flux in this region. During winter flights, large fluctuations in CO2 concentration with height are often observed both within and above the stable ABL. Usually (but not always) these variations in CO2 concentrations are associated with more or less stoichiometrically constant variations in CO and CH4 concentrations. We interpret this as reflecting the frequent transport of polluted air from Europe with very little vertical mixing having occurred, despite the large horizontal distances traversed. This notion is supported by back-trajectory analyses. Vertical profiles Of CO2 concentration with supplementary flask measurements allow more information on the structure and composition of an air mass to be obtained than is the case for flask measurements or for ground-based measurements only. In particular, our data question the notion that there is usually anything like "well mixed background air" in the mid-to-high northern latitudes during the winter months.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Lloyd, J.; Лойд Дж.; Tchebakova, Nadezhda Mikhailovna; Чебакова, Надежда Михайловна; Shibistova, Olga Borisovna; Шибистова, Ольга Борисовна
Труды сотрудников ИЛ им. В.Н. Сукачева СО РАН
w10=
Найдено документов в текущей БД: 64
Potencial climate-induced vegetation change in Siberia in the twenty-first century
: материалы временных коллективов / N. M. Tchebakova, E. I. Parfenova, A. J. Soja // Environmental change in Siberia: earth observation, field studies and modelling. - Dordrecht et. al. : Springer, 2010. - С. 67-82. - Библиогр. в конце ст.
Аннотация: Analyses demonstrate the far-reaching effects of a changing climate on vegetation cover. Hot spots of potential Siberian vegetation change are predicted for 1990. Observations of vegetation change in Siberia have already been documented in the literature. Vegetation habitats should be significantly perturbed by 2020, and markedly perturbed by 2080. Because of a dryer climate, forest-steppe and steppe-ecosystems, rather than forests, are predicted to dominate central Siberian landscapes. Despite the predicted increase in warming, permafrost is not predicted to thaw deep enough to support dark taiga over the Siberian plain, where the larch taiga will cntinue to be the dominant zonobiome. On the contrary, in the southern mountains in the absence of permafrost, dark taiga is predicted to remain the dominant orobiome.
Полный текст
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Parfenova, Elena Ivanovna; Парфенова, Елена Ивановна; Soja, A.J.; Соджа А.Дж.; Чебакова, Надежда Михайловна
Аннотация: Analyses demonstrate the far-reaching effects of a changing climate on vegetation cover. Hot spots of potential Siberian vegetation change are predicted for 1990. Observations of vegetation change in Siberia have already been documented in the literature. Vegetation habitats should be significantly perturbed by 2020, and markedly perturbed by 2080. Because of a dryer climate, forest-steppe and steppe-ecosystems, rather than forests, are predicted to dominate central Siberian landscapes. Despite the predicted increase in warming, permafrost is not predicted to thaw deep enough to support dark taiga over the Siberian plain, where the larch taiga will cntinue to be the dominant zonobiome. On the contrary, in the southern mountains in the absence of permafrost, dark taiga is predicted to remain the dominant orobiome.
Полный текст
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок, 50/28
Доп.точки доступа:
Parfenova, Elena Ivanovna; Парфенова, Елена Ивановна; Soja, A.J.; Соджа А.Дж.; Чебакова, Надежда Михайловна
Forest-based bioenergy in the Eurasian context
: материалы временных коллективов / F. Kraxner, S. Leduc, A. Z. Shvidenko // Boreal forests in a changing world: challenges and needs for action: Proceedings of the International conference August 15-21 2011, Krasnoyarsk, Russia. - Krasnoyarsk : V.N. Sukachev Institute of forest SB RAS, 2011. - С. 34-39. - Библиогр. в конце ст.
Аннотация: This study analyses the Russian forest biomass -based bioenergy sector. It is shown that presently - although given abundant resources - the share of heat and electricity from biomass is very minor. With the help of 2 IIASA models, future green-field bioenergy plants are identified in a geographically explicit way. Resulkts indicate that by using only 3.3% of the total wood removals, twice as much heat and electricity that presently available from biomass could be generated. Furthermore, there is a multitude of co-benefits quantified for the socio-economic sector such as green jobs linked to bioenergy.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Kraxner, F.; Кракснер Ф.; Leduc, S.; Ледук С.; Shvidenko, Anatoly Zinov'yevich; Швиденко, Анатолий Зиновьевич
Аннотация: This study analyses the Russian forest biomass -based bioenergy sector. It is shown that presently - although given abundant resources - the share of heat and electricity from biomass is very minor. With the help of 2 IIASA models, future green-field bioenergy plants are identified in a geographically explicit way. Resulkts indicate that by using only 3.3% of the total wood removals, twice as much heat and electricity that presently available from biomass could be generated. Furthermore, there is a multitude of co-benefits quantified for the socio-economic sector such as green jobs linked to bioenergy.
Держатели документа:
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Kraxner, F.; Кракснер Ф.; Leduc, S.; Ледук С.; Shvidenko, Anatoly Zinov'yevich; Швиденко, Анатолий Зиновьевич
TEMPERATURE-INDUCED RESPONSES OF XYLEM STRUCTURE OF LARIX SIBIRICA (PINACEAE) FROM THE RUSSIAN ALTAY
/ P. . Fonti [et al.] // Am. J. Bot. - 2013. - Vol. 100, Is. 7. - P1332-1343, DOI 10.3732/ajb.1200484. - Cited References: 53. - The authors thank N. S. van Doorn for editing the English. This work has been supported by the Russian Foundation for Basic Research (Project Number 11-04-91153_a) and the Swiss National Science Foundation projects "Identifying seasonal climatic signals from water conducting cells in tree rings" (Nr. IZK0Z3_131408), "Tree growth and forest ecosystem functioning in Eurasia under changing climate" (Nr. IZ73Z0_128035), and "INtra-seasonal Tree growth along Elevational GRAdients in the European Alps" (INTEGRAL, Nr 200021_121859), and the Ministry of Education and Science of the Russian Federation (Scientific School 5327.2012.4).
. - 12. - ISSN 0002-9122
РУБ Plant Sciences
Аннотация: Premise of the study: Xylem structure determines the hydraulic and mechanical properties of a stem, and its plasticity is fundamental for maintaining tree performance under changing conditions. Unveiling the mechanism and the range of xylem adjustment is thus necessary to anticipate climate change impacts on vegetation. Methods: To understand the mechanistic process and the functional impact of xylem responses to warming in a cold-limited environment, we investigated the relationship between temperature and tracheid anatomy along a 312-yr tree-ring chronology of Larix sibirica trees from the Altay Mountains in Russia. Key results: Climate-growth analyses indicated that warming favors wider earlywood cell lumen, thicker laewood walls, denser maximum latewood, and wider rings. The temperature signal of the latewood was stronger (r > 0.7) and covered a longer and more stable period (from June to August) than that of earlywood and tree-ring width. Long-term analyses indicated a diverging trend between lumen and cell wall of early-and latewood. Conclusions: Xylem anatomy appears to respond to warming temperatures. A warmer early-growing season raises water conduction capacity by increasing the number and size of earlywood tracheids. The higher-performing earlywood tracheids promote more carbon fixation of the latewood cells by incrementing the rate of assimilation when summer conditions are favorable for growth. The diverging long-term variation of lumen and cell wall in earlywood vs. latewood suggests that xylem adjustments in latewood increase mechanical integrity and support increasing tree size under the ameliorated growing conditions.
Полный текст,
WOS,
Scopus
Держатели документа:
[Fonti, Patrick] WSL Swiss Fed Res Inst, CH-8903 Birmensdorf, Switzerland
[Bryukhanova, Marina V.
Kirdyanov, Alexander V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Myglan, Vladimir S.
Naumova, Oksana V.
Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Fonti, P...; Bryukhanova, M.V.; Myglan, V.S.; Kirdyanov, A.V.; Naumova, O.V.; Vaganov, E.A.
Рубрики:
TREE-RING WIDTH
WOOD ANATOMY
HYDRAULIC ARCHITECTURE
SCOTS PINE
TRACHEID DIMENSIONS
SUMMER TEMPERATURE
DROUGHT
MORTALITY
CLIMATE
GROWTH
Кл.слова (ненормированные):
climatic conditions -- Larix sibirica -- Pinaceae -- tracheid lumen -- tracheid wall -- tree-ring anatomy -- wood density -- xylem anatomical traits
TREE-RING WIDTH
WOOD ANATOMY
HYDRAULIC ARCHITECTURE
SCOTS PINE
TRACHEID DIMENSIONS
SUMMER TEMPERATURE
DROUGHT
MORTALITY
CLIMATE
GROWTH
Кл.слова (ненормированные):
climatic conditions -- Larix sibirica -- Pinaceae -- tracheid lumen -- tracheid wall -- tree-ring anatomy -- wood density -- xylem anatomical traits
Аннотация: Premise of the study: Xylem structure determines the hydraulic and mechanical properties of a stem, and its plasticity is fundamental for maintaining tree performance under changing conditions. Unveiling the mechanism and the range of xylem adjustment is thus necessary to anticipate climate change impacts on vegetation. Methods: To understand the mechanistic process and the functional impact of xylem responses to warming in a cold-limited environment, we investigated the relationship between temperature and tracheid anatomy along a 312-yr tree-ring chronology of Larix sibirica trees from the Altay Mountains in Russia. Key results: Climate-growth analyses indicated that warming favors wider earlywood cell lumen, thicker laewood walls, denser maximum latewood, and wider rings. The temperature signal of the latewood was stronger (r > 0.7) and covered a longer and more stable period (from June to August) than that of earlywood and tree-ring width. Long-term analyses indicated a diverging trend between lumen and cell wall of early-and latewood. Conclusions: Xylem anatomy appears to respond to warming temperatures. A warmer early-growing season raises water conduction capacity by increasing the number and size of earlywood tracheids. The higher-performing earlywood tracheids promote more carbon fixation of the latewood cells by incrementing the rate of assimilation when summer conditions are favorable for growth. The diverging long-term variation of lumen and cell wall in earlywood vs. latewood suggests that xylem adjustments in latewood increase mechanical integrity and support increasing tree size under the ameliorated growing conditions.
Полный текст,
WOS,
Scopus
Держатели документа:
[Fonti, Patrick] WSL Swiss Fed Res Inst, CH-8903 Birmensdorf, Switzerland
[Bryukhanova, Marina V.
Kirdyanov, Alexander V.] VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Myglan, Vladimir S.
Naumova, Oksana V.
Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
Институт леса им. В.Н. Сукачева Сибирского отделения Российской академии наук : 660036, Красноярск, Академгородок 50/28
Доп.точки доступа:
Fonti, P...; Bryukhanova, M.V.; Myglan, V.S.; Kirdyanov, A.V.; Naumova, O.V.; Vaganov, E.A.
Stable carbon isotope labeling reveals different carry-over effects between functional types of tropical trees in an Ethiopian mountain forest
/ J. . Krepkowski [et al.] // New Phytol. - 2013. - Vol. 199, Is. 2. - P431-440, DOI 10.1111/nph.12266. - Cited References: 56. - We are indebted to the German Research Foundation for funding this project (BR 1895/15). We are grateful to the two anonymous reviewers for their constructive comments, which helped us to improve the quality of the paper.
. - 10. - ISSN 0028-646X
РУБ Plant Sciences
Аннотация: We present an intra-annual stable carbon isotope (13C) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual 13C analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P.falcatus, it was possible to synchronize annual 13C peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C.macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our 13C labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled 13C is stored in reserves of wood parenchyma for up to 3yr in P.falcatus. By contrast, C.macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.
Полный текст,
WOS,
Scopus
Держатели документа:
[Krepkowski, Julia
Braeuning, Achim] Univ Erlangen Nurnberg, Inst Geog, D-91054 Erlangen, Germany
[Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi, Kenya
[Shibistova, Olga] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Рубрики:
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
PODOCARPUS-FALCATUS
SOUTHERN ETHIOPIA
ALPHA-CELLULOSE
DECIDUOUS TREES
GROWTH DYNAMICS
TIME-SERIES
RINGS
RECONSTRUCTION
DELTA-C-13
DELTA-O-18
Кл.слова (ненормированные):
carryover effect -- dendrometer -- Ethiopia -- growth dynamics -- stable carbon isotopes -- tropical dendrochronology -- wood anatomy
Аннотация: We present an intra-annual stable carbon isotope (13C) study based on a labeling experiment to illustrate differences in temporal patterns of recent carbon allocation to wood structures of two functional types of trees, Podocarpus falcatus (a late-successional evergreen conifer) and Croton macrostachyus (a deciduous broadleaved pioneer tree), in a tropical mountain forest in Ethiopia. Dendrometer data, wood anatomical thin sections, and intra-annual 13C analyses were applied. Isotope data revealed a clear annual growth pattern in both studied species. For P.falcatus, it was possible to synchronize annual 13C peaks, wood anatomical structures and monthly precipitation patterns. The labeling signature was evident for three consecutive years. For C.macrostachyus, isotope data illustrate a rapid decline of the labeling signal within half a year. Our 13C labeling study indicates a distinct difference in carryover effects between trees of different functional types. A proportion of the labeled 13C is stored in reserves of wood parenchyma for up to 3yr in P.falcatus. By contrast, C.macrostachyus shows a high turnover of assimilates and a carbon carryover effect is only detectable in the subsequent year.
Полный текст,
WOS,
Scopus
Держатели документа:
[Krepkowski, Julia
Braeuning, Achim] Univ Erlangen Nurnberg, Inst Geog, D-91054 Erlangen, Germany
[Gebrekirstos, Aster] World Agroforestry Ctr, Nairobi, Kenya
[Shibistova, Olga] Leibniz Univ Hannover, Inst Soil Sci, D-30419 Hannover, Germany
[Shibistova, Olga] Russian Acad Sci, VN Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Krepkowski, J...; Gebrekirstos, A...; Shibistova, O...; Brauning, A...
Comparison and assessment of coarse resolution land cover maps for Northern Eurasia
[Text] / D. . Pflugmacher [et al.] // Remote Sens. Environ. - 2011. - Vol. 115, Is. 12. - P3539-3553, DOI 10.1016/j.rse.2011.08.016. - Cited References: 65. - The research was supported by the Land Cover/Land-Use Change Program of the National Aeronautics and Space Administration (grant numbers NNGO6GF54G and NNX09AK88G) and in part by the Asia-Pacific Network for Global Change Research and the Alexander von Humboldt Foundation. We like to thank Dr. Curtis Woodcock for his advice in the early planning of this study, and Gretchen Bracher for preparing graphs. We are also thankful for the comments of two anonymous reviewers that helped to improve this manuscript.
. - 15. - ISSN 0034-4257
РУБ Environmental Sciences + Remote Sensing + Imaging Science & Photographic Technology
Аннотация: Information on land cover at global and continental scales is critical for addressing a range of ecological, socioeconomic and policy questions. Global land cover maps have evolved rapidly in the last decade, but efforts to evaluate map uncertainties have been limited, especially in remote areas like Northern Eurasia. Northern Eurasia comprises a particularly diverse region covering a wide range of climate zones and ecosystems: from arctic deserts, tundra, boreal forest, and wetlands, to semi-arid steppes and the deserts of Central Asia. In this study, we assessed four of the most recent global land cover datasets: GLC-2000, GLOBCOVER, and the MODIS Collection 4 and Collection 5 Land Cover Product using cross-comparison analyses and Landsat-based reference maps distributed throughout the region. A consistent comparison of these maps was challenging because of disparities in class definitions, thematic detail, and spatial resolution. We found that the choice of sampling unit significantly influenced accuracy estimates, which indicates that comparisons of reported global map accuracies might be misleading. To minimize classification ambiguities, we devised a generalized legend based on dominant life form types (LFT) (tree, shrub, and herbaceous vegetation, barren land and water). LFT served as a necessary common denominator in the analyzed map legends, but significantly decreased the thematic detail. We found significant differences in the spatial representation of LFT's between global maps with high spatial agreement (above 0.8) concentrated in the forest belt of Northern Eurasia and low agreement (below 0.5) concentrated in the northern taiga-tundra zone, and the southern dry lands. Total pixel-level agreement between global maps and six test sites was moderate to fair (overall agreement: 0.67-0.74, Kappa: 0.41-0.52) and increased by 0.09-0.45 when only homogenous land cover types were analyzed. Low map accuracies at our tundra test site confirmed regional disagreements and difficulties of current global maps in accurately mapping shrub and herbaceous vegetation types at the biome borders of Northern Eurasia. In comparison, tree dominated vegetation classes in the forest belt of the region were accurately mapped, but were slightly overestimated (10%-20%), in all maps. Low agreement of global maps in the northern and southern vegetation transition zones of Northern Eurasia is likely to have important implications for global change research, as those areas are vulnerable to both climate and socio-economic changes. (C) 2011 Elsevier Inc. All rights reserved.
ELSEVIER - полный текст,
WOS,
Scopus
Держатели документа:
[Pflugmacher, Dirk
Krankina, Olga N.
Kennedy, Robert E.
Nelson, Peder] Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR 97331 USA
[Cohen, Warren B.] US Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331 USA
[Friedl, Mark A.
Sulla-Menashe, Damien] Boston Univ, Dept Geog & Environm, Boston, MA 02215 USA
[Loboda, Tatiana V.] Univ Maryland, Dept Geog, College Pk, MD 20742 USA
[Kuemmerle, Tobias] Potsdam Inst Climate Impact Res PIK, D-14412 Potsdam, Germany
[Dyukarev, Egor] Inst Monitoring Climat & Ecol Syst, Tomsk 634021, Russia
[Elsakov, Vladimir] Russian Acad Sci, Komi Sci Ctr, Inst Biol, Syktyvkar 167610, Russia
[Kharuk, Viacheslav I.] VN Sukachev Inst Forest, Krasnoyarsk, Russia
Доп.точки доступа:
Pflugmacher, D...; Krankina, O.N.; Cohen, W.B.; Friedl, M.A.; Sulla-Menashe, D...; Kennedy, R.E.; Nelson, P...; Loboda, T.V.; Kuemmerle, T...; Dyukarev, E...; Elsakov, V...; Kharuk, V.I.
Рубрики:
ACCURACY ASSESSMENT
SATELLITE DATA
MODIS DATA
PRODUCTS
DATASETS
CARBON
CLASSIFICATION
VALIDATION
SURFACE
EARTH
Кл.слова (ненормированные):
Eurasia -- Land cover -- Global -- Validation -- GLC-2000 -- GLOBCOVER -- MODIS -- LCCS
ACCURACY ASSESSMENT
SATELLITE DATA
MODIS DATA
PRODUCTS
DATASETS
CARBON
CLASSIFICATION
VALIDATION
SURFACE
EARTH
Кл.слова (ненормированные):
Eurasia -- Land cover -- Global -- Validation -- GLC-2000 -- GLOBCOVER -- MODIS -- LCCS
Аннотация: Information on land cover at global and continental scales is critical for addressing a range of ecological, socioeconomic and policy questions. Global land cover maps have evolved rapidly in the last decade, but efforts to evaluate map uncertainties have been limited, especially in remote areas like Northern Eurasia. Northern Eurasia comprises a particularly diverse region covering a wide range of climate zones and ecosystems: from arctic deserts, tundra, boreal forest, and wetlands, to semi-arid steppes and the deserts of Central Asia. In this study, we assessed four of the most recent global land cover datasets: GLC-2000, GLOBCOVER, and the MODIS Collection 4 and Collection 5 Land Cover Product using cross-comparison analyses and Landsat-based reference maps distributed throughout the region. A consistent comparison of these maps was challenging because of disparities in class definitions, thematic detail, and spatial resolution. We found that the choice of sampling unit significantly influenced accuracy estimates, which indicates that comparisons of reported global map accuracies might be misleading. To minimize classification ambiguities, we devised a generalized legend based on dominant life form types (LFT) (tree, shrub, and herbaceous vegetation, barren land and water). LFT served as a necessary common denominator in the analyzed map legends, but significantly decreased the thematic detail. We found significant differences in the spatial representation of LFT's between global maps with high spatial agreement (above 0.8) concentrated in the forest belt of Northern Eurasia and low agreement (below 0.5) concentrated in the northern taiga-tundra zone, and the southern dry lands. Total pixel-level agreement between global maps and six test sites was moderate to fair (overall agreement: 0.67-0.74, Kappa: 0.41-0.52) and increased by 0.09-0.45 when only homogenous land cover types were analyzed. Low map accuracies at our tundra test site confirmed regional disagreements and difficulties of current global maps in accurately mapping shrub and herbaceous vegetation types at the biome borders of Northern Eurasia. In comparison, tree dominated vegetation classes in the forest belt of the region were accurately mapped, but were slightly overestimated (10%-20%), in all maps. Low agreement of global maps in the northern and southern vegetation transition zones of Northern Eurasia is likely to have important implications for global change research, as those areas are vulnerable to both climate and socio-economic changes. (C) 2011 Elsevier Inc. All rights reserved.
ELSEVIER - полный текст,
WOS,
Scopus
Держатели документа:
[Pflugmacher, Dirk
Krankina, Olga N.
Kennedy, Robert E.
Nelson, Peder] Oregon State Univ, Dept Forest Ecosyst & Soc, Corvallis, OR 97331 USA
[Cohen, Warren B.] US Forest Serv, USDA, Pacific NW Res Stn, Forestry Sci Lab, Corvallis, OR 97331 USA
[Friedl, Mark A.
Sulla-Menashe, Damien] Boston Univ, Dept Geog & Environm, Boston, MA 02215 USA
[Loboda, Tatiana V.] Univ Maryland, Dept Geog, College Pk, MD 20742 USA
[Kuemmerle, Tobias] Potsdam Inst Climate Impact Res PIK, D-14412 Potsdam, Germany
[Dyukarev, Egor] Inst Monitoring Climat & Ecol Syst, Tomsk 634021, Russia
[Elsakov, Vladimir] Russian Acad Sci, Komi Sci Ctr, Inst Biol, Syktyvkar 167610, Russia
[Kharuk, Viacheslav I.] VN Sukachev Inst Forest, Krasnoyarsk, Russia
Доп.точки доступа:
Pflugmacher, D...; Krankina, O.N.; Cohen, W.B.; Friedl, M.A.; Sulla-Menashe, D...; Kennedy, R.E.; Nelson, P...; Loboda, T.V.; Kuemmerle, T...; Dyukarev, E...; Elsakov, V...; Kharuk, V.I.
Aerosol particle number size distributions and particulate light absorption at the ZOTTO tall tower (Siberia), 2006-2009
[Text] / J. . Heintzenberg [et al.] // Atmos. Chem. Phys. - 2011. - Vol. 11, Is. 16. - P8703-8719, DOI 10.5194/acp-11-8703-2011. - Cited References: 65. - The Max Planck Society in collaboration with the V. N. Sukachev Institute of Forest established the ZOTTO facility after many years of preparatory fieldwork, planning and massive investments. We thank E.-D. Schulze and M. Heimann (MPI Biogeochemistry), A. A. Onuchin, and S. Verchovetz, (V. N. Sukachev Institute of Forest) for their contributions to the establishment and management of ZOTTO, and Y. Kisilyakhov, A. Tsukanov (V. N. Sukachev Institute of Forest), M. Welling and N. Jurgens (MPI Chemistry), as well as S. Leinert and T. Muller (IfT) for technical support. The ZOTTO project is funded by the Max Plank Society through the International Science and Technology Center (ISTC) partner project #2757p within the framework of the proposal 'Observing and Understanding Biogeochemical Responses to Rapid Climate Changes in Eurasia', and by the German Research Council (DFG). We thank S. Schmidt and K. Kubler (MPI Jena) for their continuous logistic assistance during the experiment. We acknowledge U. Riebel (Technical University of Cottbus, Chair for Particle Technology) for generously sharing his technology of the corona discharge based aerosol neutralizer. We thank A. Wiedensohler (IfT Leipzig) for the fruitful discussions about environmental aerosol charging.
. - 17. - ISSN 1680-7316
РУБ Meteorology & Atmospheric Sciences
Аннотация: This paper analyses aerosol particle number size distributions, particulate absorption at 570 nm wavelength and carbon monoxide (CO) measured between September 2006 and January 2010 at heights of 50 and 300 m at the Zotino Tall Tower Facility (ZOTTO) in Siberia (60.8 degrees N; 89.35 degrees E). Average number, surface and volume concentrations are broadly comparable to former studies covering shorter observation periods. Fits of multiple lognormal distributions yielded three maxima in probability distribution of geometric mean diameters in the Aitken and accumulation size range and a possible secondary maximum in the nucleation size range below 25 nm. The seasonal cycle of particulate absorption shows maximum concentrations in high winter (December) and minimum concentrations in mid-summer (July). The 90th percentile, however, indicates a secondary maximum in July/August that is likely related to forest fires. The strongly combustion derived CO shows a single winter maximum and a late summer minimum, albeit with a considerably smaller seasonal swing than the particle data due to its longer atmospheric lifetime. Total volume and even more so total number show a more complex seasonal variation with maxima in winter, spring, and summer. A cluster analysis of back trajectories and vertical profiles of the pseudo-potential temperature yielded ten clusters with three levels of particle number concentration: Low concentrations in Arctic air masses (400-500 cm(-3)), mid-level concentrations for zonally advected air masses from westerly directions between 55 degrees and 65 degrees N (600-800 cm(-3)), and high concentrations for air masses advected from the belt of industrial and population centers in Siberia and Kazakhstan (1200 cm(-3)). The observational data is representative for large parts of the troposphere over Siberia and might be particularly useful for the validation of global aerosol transport models.
WOS,
Scopus
Держатели документа:
[Heintzenberg, J.
Birmili, W.
Otto, R.] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany
[Andreae, M. O.
Mayer, J. -C.
Chi, X.] Max Planck Inst Chem, D-55020 Mainz, Germany
[Panov, A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Heintzenberg, J...; Birmili, W...; Otto, R...; Andreae, M.O.; Mayer, J.C.; Chi, X...; Panov, A...
Рубрики:
TRAJECTORY CLUSTER-ANALYSIS
LONG-RANGE TRANSPORT
TRACE-GAS
BOREAL FORESTS
ATMOSPHERIC AEROSOLS
FORMATION EVENTS
CENTRAL-EUROPE
AIR-POLLUTION
FLOW PATTERNS
SMEAR-II
TRAJECTORY CLUSTER-ANALYSIS
LONG-RANGE TRANSPORT
TRACE-GAS
BOREAL FORESTS
ATMOSPHERIC AEROSOLS
FORMATION EVENTS
CENTRAL-EUROPE
AIR-POLLUTION
FLOW PATTERNS
SMEAR-II
Аннотация: This paper analyses aerosol particle number size distributions, particulate absorption at 570 nm wavelength and carbon monoxide (CO) measured between September 2006 and January 2010 at heights of 50 and 300 m at the Zotino Tall Tower Facility (ZOTTO) in Siberia (60.8 degrees N; 89.35 degrees E). Average number, surface and volume concentrations are broadly comparable to former studies covering shorter observation periods. Fits of multiple lognormal distributions yielded three maxima in probability distribution of geometric mean diameters in the Aitken and accumulation size range and a possible secondary maximum in the nucleation size range below 25 nm. The seasonal cycle of particulate absorption shows maximum concentrations in high winter (December) and minimum concentrations in mid-summer (July). The 90th percentile, however, indicates a secondary maximum in July/August that is likely related to forest fires. The strongly combustion derived CO shows a single winter maximum and a late summer minimum, albeit with a considerably smaller seasonal swing than the particle data due to its longer atmospheric lifetime. Total volume and even more so total number show a more complex seasonal variation with maxima in winter, spring, and summer. A cluster analysis of back trajectories and vertical profiles of the pseudo-potential temperature yielded ten clusters with three levels of particle number concentration: Low concentrations in Arctic air masses (400-500 cm(-3)), mid-level concentrations for zonally advected air masses from westerly directions between 55 degrees and 65 degrees N (600-800 cm(-3)), and high concentrations for air masses advected from the belt of industrial and population centers in Siberia and Kazakhstan (1200 cm(-3)). The observational data is representative for large parts of the troposphere over Siberia and might be particularly useful for the validation of global aerosol transport models.
WOS,
Scopus
Держатели документа:
[Heintzenberg, J.
Birmili, W.
Otto, R.] Leibniz Inst Tropospher Res, D-04318 Leipzig, Germany
[Andreae, M. O.
Mayer, J. -C.
Chi, X.] Max Planck Inst Chem, D-55020 Mainz, Germany
[Panov, A.] Russian Acad Sci, Siberian Branch, VN Sukachev Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Heintzenberg, J...; Birmili, W...; Otto, R...; Andreae, M.O.; Mayer, J.C.; Chi, X...; Panov, A...
Reconstruction of Paleohydrological Regime, Vegetation Change, and Peat Accumulation in a Bog in the Kas-Sym Interfluve
[Text] / L. V. Karpenko // Contemp. Probl. Ecol. - 2010. - Vol. 3, Is. 2. - P221-227, DOI 10.1134/S199542551002013X. - Cited References: 12
. - 7. - ISSN 1995-4255
РУБ Ecology
Кл.слова (ненормированные):
bog -- reconstruction -- paleohydrological regime -- vegetation changes -- peat accumulation
Аннотация: Comprehensive stratigraphic analyses of a standard peat profile laid on a large oligotrophic bog in the interfluve of Kas and Sym rivers, left tributaries of the Yenisei River, allowed reconstruction of local vegetation change and hydrological regime over a period of seven thousand years. The established three stages in vegetation succession in a local bog correspond to different degree of humidification. The development of bog ecosystem is found to be scarcely affected by regional climate. The process and rate of peat accumulation varied in different periods of the Holocene. The average rate of peat accumulation in the profile was 0.88 mm/year.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Karpenko, L.V.
Кл.слова (ненормированные):
bog -- reconstruction -- paleohydrological regime -- vegetation changes -- peat accumulation
Аннотация: Comprehensive stratigraphic analyses of a standard peat profile laid on a large oligotrophic bog in the interfluve of Kas and Sym rivers, left tributaries of the Yenisei River, allowed reconstruction of local vegetation change and hydrological regime over a period of seven thousand years. The established three stages in vegetation succession in a local bog correspond to different degree of humidification. The development of bog ecosystem is found to be scarcely affected by regional climate. The process and rate of peat accumulation varied in different periods of the Holocene. The average rate of peat accumulation in the profile was 0.88 mm/year.
Полный текст,
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Sukachev Inst Forest, Siberian Branch, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Karpenko, L.V.
Isotopic composition (delta(13)C, delta(18)O) in wood and cellulose of Siberian larch trees for early Medieval and recent periods
[Text] / O. V. Sidorova [et al.] // J. Geophys. Res.-Biogeosci. - 2008. - Vol. 113, Is. G2. - Ст. G02019, DOI 10.1029/2007JG000473. - Cited References: 63
. - 13. - ISSN 0148-0227
РУБ Environmental Sciences + Geosciences, Multidisciplinary
Аннотация: We related tree ring width (TRW) and isotopic composition (delta(13)C, delta(18)O) of wood and cellulose from four larch trees (Larix cajanderi Mayr.) to climate parameters. The material was sampled in northeastern Yakutia [70 degrees N-148 degrees E] for the recent (AD 1880-2004) and early Medieval (AD 900-1000) periods. During the recent period June, July, and August air temperatures were positively correlated with delta(13)C and delta(18)O of wood and cellulose, while July precipitation was negatively correlated. Furthermore, the vapor pressure deficit (VPD) of July and August was significantly correlated with delta(13)C of wood and cellulose, but VPD had almost no influence on delta(18)O. Comparative analyses between mean isotope values for the (AD 900-1000) and (AD 1880-2004) periods indicate similar ranges of climatic conditions, with the exception of the period AD 1950-2004. While isotopic ratios in cellulose are reliably related to climatic variables, during some periods those in whole wood showed even stronger relationships. Strong positive correlations between delta(18)O of cellulose and Greenland ice-core (GISP2) data were detected for the beginning of the Medieval period (r = 0.86; p 0.05), indicating the reliability of isotope signals in tree rings for large-scale reconstructions.
WOS,
Scopus
Держатели документа:
[Sidorova, Olga V.
Naurzbaev, Mukhtar M.
Vaganov, Eugene A.] Akademgorodok, VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Siegwolf, Rolf T. W.
Saurer, Matthias] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk, Russia
Доп.точки доступа:
Sidorova, O.V.; Siegwolf, RTW; Saurer, M...; Naurzbaev, M.M.; Vaganov, E.A.
Рубрики:
STABLE-ISOTOPES
ATMOSPHERIC CO2
WHOLE WOOD
RINGS
TEMPERATURE
CARBON
RATIOS
VARIABILITY
SAMPLES
LIGNIN
STABLE-ISOTOPES
ATMOSPHERIC CO2
WHOLE WOOD
RINGS
TEMPERATURE
CARBON
RATIOS
VARIABILITY
SAMPLES
LIGNIN
Аннотация: We related tree ring width (TRW) and isotopic composition (delta(13)C, delta(18)O) of wood and cellulose from four larch trees (Larix cajanderi Mayr.) to climate parameters. The material was sampled in northeastern Yakutia [70 degrees N-148 degrees E] for the recent (AD 1880-2004) and early Medieval (AD 900-1000) periods. During the recent period June, July, and August air temperatures were positively correlated with delta(13)C and delta(18)O of wood and cellulose, while July precipitation was negatively correlated. Furthermore, the vapor pressure deficit (VPD) of July and August was significantly correlated with delta(13)C of wood and cellulose, but VPD had almost no influence on delta(18)O. Comparative analyses between mean isotope values for the (AD 900-1000) and (AD 1880-2004) periods indicate similar ranges of climatic conditions, with the exception of the period AD 1950-2004. While isotopic ratios in cellulose are reliably related to climatic variables, during some periods those in whole wood showed even stronger relationships. Strong positive correlations between delta(18)O of cellulose and Greenland ice-core (GISP2) data were detected for the beginning of the Medieval period (r = 0.86; p 0.05), indicating the reliability of isotope signals in tree rings for large-scale reconstructions.
WOS,
Scopus
Держатели документа:
[Sidorova, Olga V.
Naurzbaev, Mukhtar M.
Vaganov, Eugene A.] Akademgorodok, VN Sukachev Inst Forest SB RAS, Krasnoyarsk 660036, Russia
[Siegwolf, Rolf T. W.
Saurer, Matthias] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[Vaganov, Eugene A.] Siberian Fed Univ, Krasnoyarsk, Russia
Доп.точки доступа:
Sidorova, O.V.; Siegwolf, RTW; Saurer, M...; Naurzbaev, M.M.; Vaganov, E.A.
Individual-based measurement and analysis of root system development: case studies for Larix gmelinii trees growing on the permafrost region in Siberia
[Text] / T. . Kajimoto [et al.] // J. For. Res. - 2007. - Vol. 12, Is. 2. - P103-112, DOI 10.1007/s10310-006-0259-y. - Cited References: 49
. - 10. - ISSN 1341-6979
РУБ Forestry
Аннотация: We present results of individual-based root system measurement and analysis applied for Larix gmelinii trees growing on the continuous permafrost region of central Siberia. The data of root excavation taken from the three stands were used for the analyses; young (26 years old), mature (105 years old), and uneven-aged over-mature stand (220 years old). In this article, we highlight two topics: (1) factors affecting spatio-temporal pattern of root system development, and (2) interactions between aboveground (i.e., crown) and belowground (i.e., root) competition. For the first topic, the detailed observation of lateral roots was applied to one sample tree of the overmature stand. The tree constructed a superficial (< 30 cm in depth) and rather asymmetric root system, and each lateral root expanded mainly into elevated mounds rather than depressed troughs. This indicated that spatial development of an individual root system was largely affected by microtopography (i.e., earth hummocks). For these lateral roots, elongation growth curves were reconstructed using annual-ring data, and annual growth rates and patterns were compared among them. The comparison suggested that temporal root system development is associated with differences in carbon allocation among the lateral roots. For the second topic, we examined relationships between individual crown projection area (CA) and horizontal rooting area (RA) for the sample trees of each stand. RA was almost equal to CA in the young stand, while RA was much larger (three or four times) than CA in the mature and overmature stands. Two measures of stand-level space occupation, crown area index (aboveground: CAI; sum of CAs per unit land area) and rooting area index (belowground: RAI; sum of RAs), were estimated in each stand. The estimates of RA1 (1.3-1.8 m(2) m(-2)) exceeded unity in all stands. In contrast, CAI exceeded unity (1.3 m(2) m(-2)) only in the young stand, and was much smaller (< 0.3 m(2) m(-2)) in the two older stands. These between-stand differences in RAI-CAI relationships suggest that intertree competition for both aboveground and belowground spaces occurred in the young stand, but only belowground competition still occurred in the two older stands. Based on this finding, we hypothesized that competition below the ground may become predominant as a stand ages in L. gmelinii forests. Methodological limitations of our analysis are also discussed, especially for the analysis using the two indices of space occupation (CAI, RAI).
Полный текст,
WOS,
Scopus
Держатели документа:
Forestry & Forest Prod Res Inst, Kyushu Res Ctr, Kumamoto 8600862, Japan
Ryukoku Univ, Fac Intercultural Commun, Otsu, Shiga, Japan
Forestry & Forest Prod Res Inst, Tsukuba, Ibaraki 305, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk, Russia
Kyoto Univ, Fac Agr, Kyoto, Japan
Kyoto Univ, Field Sci Educ & Res Ctr, Kyoto, Japan
Okayama Univ, Grad Sch Environm Sci, Okayama 7008530, Japan
Доп.точки доступа:
Kajimoto, T...; Osawa, A...; Matsuura, Y...; Abaimov, A.P.; Zyryanova, O.A.; Kondo, K...; Tokuchi, N...; Hirobe, M...
Рубрики:
MINIRHIZOTRON TECHNIQUE
ABOVEGROUND BIOMASS
FOREST ECOSYSTEMS
GROWTH EFFICIENCY
DOUGLAS-FIR
DYNAMICS
ARCHITECTURE
COMPETITION
PLANTATION
PATTERNS
Кл.слова (ненормированные):
crown projection area -- Larix gmelinii -- permafrost -- rooting area index -- root system development
MINIRHIZOTRON TECHNIQUE
ABOVEGROUND BIOMASS
FOREST ECOSYSTEMS
GROWTH EFFICIENCY
DOUGLAS-FIR
DYNAMICS
ARCHITECTURE
COMPETITION
PLANTATION
PATTERNS
Кл.слова (ненормированные):
crown projection area -- Larix gmelinii -- permafrost -- rooting area index -- root system development
Аннотация: We present results of individual-based root system measurement and analysis applied for Larix gmelinii trees growing on the continuous permafrost region of central Siberia. The data of root excavation taken from the three stands were used for the analyses; young (26 years old), mature (105 years old), and uneven-aged over-mature stand (220 years old). In this article, we highlight two topics: (1) factors affecting spatio-temporal pattern of root system development, and (2) interactions between aboveground (i.e., crown) and belowground (i.e., root) competition. For the first topic, the detailed observation of lateral roots was applied to one sample tree of the overmature stand. The tree constructed a superficial (< 30 cm in depth) and rather asymmetric root system, and each lateral root expanded mainly into elevated mounds rather than depressed troughs. This indicated that spatial development of an individual root system was largely affected by microtopography (i.e., earth hummocks). For these lateral roots, elongation growth curves were reconstructed using annual-ring data, and annual growth rates and patterns were compared among them. The comparison suggested that temporal root system development is associated with differences in carbon allocation among the lateral roots. For the second topic, we examined relationships between individual crown projection area (CA) and horizontal rooting area (RA) for the sample trees of each stand. RA was almost equal to CA in the young stand, while RA was much larger (three or four times) than CA in the mature and overmature stands. Two measures of stand-level space occupation, crown area index (aboveground: CAI; sum of CAs per unit land area) and rooting area index (belowground: RAI; sum of RAs), were estimated in each stand. The estimates of RA1 (1.3-1.8 m(2) m(-2)) exceeded unity in all stands. In contrast, CAI exceeded unity (1.3 m(2) m(-2)) only in the young stand, and was much smaller (< 0.3 m(2) m(-2)) in the two older stands. These between-stand differences in RAI-CAI relationships suggest that intertree competition for both aboveground and belowground spaces occurred in the young stand, but only belowground competition still occurred in the two older stands. Based on this finding, we hypothesized that competition below the ground may become predominant as a stand ages in L. gmelinii forests. Methodological limitations of our analysis are also discussed, especially for the analysis using the two indices of space occupation (CAI, RAI).
Полный текст,
WOS,
Scopus
Держатели документа:
Forestry & Forest Prod Res Inst, Kyushu Res Ctr, Kumamoto 8600862, Japan
Ryukoku Univ, Fac Intercultural Commun, Otsu, Shiga, Japan
Forestry & Forest Prod Res Inst, Tsukuba, Ibaraki 305, Japan
Russian Acad Sci, VN Sukachev Inst Forest, Krasnoyarsk, Russia
Kyoto Univ, Fac Agr, Kyoto, Japan
Kyoto Univ, Field Sci Educ & Res Ctr, Kyoto, Japan
Okayama Univ, Grad Sch Environm Sci, Okayama 7008530, Japan
Доп.точки доступа:
Kajimoto, T...; Osawa, A...; Matsuura, Y...; Abaimov, A.P.; Zyryanova, O.A.; Kondo, K...; Tokuchi, N...; Hirobe, M...
Effects of repeated fires on ecosystem C and N stocks along a fire induced forest/grassland gradient
/ C. H. Cheng [et al.] // J. Geophys. Res.-Biogeosci. - 2013. - Vol. 118, Is. 1. - P215-225, DOI 10.1002/jgrg.20019. - Cited References: 56. - This study was supported by the National Science Council of Taiwan and the cooperative grant from the National Science Council of Taiwan and the Siberian Branch of the Russian Academy of Sciences. We gratefully acknowledge Dr. Julie Major for her helpful comments and review. We also thank Yin-Ru Lin, Chih-Yu Hung, Da-Fun Lin, Chung-Yu Lee, and Chang-Ya Chen for their valuable assistance during field work.
. - 11. - ISSN 2169-8953
РУБ Environmental Sciences + Geosciences, Multidisciplinary
Аннотация: Repeated fires might have different effect on ecosystem carbon storage than a single fire event, but information on repeated fires and their effects on forest ecosystems and carbon storage is scarce. However, changes in climate, vegetation composition, and human activities are expected to make forests more susceptible to fires that recur with relatively high frequency. In this study, the effects of repeated fires on ecosystem carbon and nitrogen stocks were examined along a fire-induced forest/grassland gradient wherein the fire events varied from an unburned forest to repeatedly burned grassland. Results from the study show repeated fires drastically decreased ecosystem carbon and nitrogen stocks along the forest/grassland gradient. The reduction began with the disappearance of living tree biomass, and followed by the loss of soil carbon and nitrogen. Within 4 years of the onset of repeated fires on the unburned forest, the original ecosystem carbon and nitrogen stocks were reduced by 42% and 21%, respectively. Subsequent fires caused cumulative reductions in ecosystem carbon and nitrogen stocks by 68% and 44% from the original ecosystem carbon and nitrogen stocks, respectively. The analyses of carbon budgets calculated by vegetation composition and stable isotopic delta C-13 values indicate that 84% of forest-derived carbon is lost at grassland, whereas the gain of grass-derived carbon only compensates 18% for this loss. Such significant losses in ecosystem carbon and nitrogen stocks suggest that the effects of repeated fires have substantial impacts on ecosystem and soil carbon and nitrogen cycling. Citation: Cheng, C.-H., Y.-S. Chen, Y.-H. Huang, Chiou C.-R., C.-C. Lin, and O. V. Menyailo (2013), Effects of repeated fires on ecosystem C and N stocks along a fire induced forest/grassland gradient, J. Geophys. Res. Biogeosci., 118, 215-225, doi:10.1002/jgrg.20019
WOS,
Scopus,
Полный текст
Держатели документа:
[Cheng, Chih-Hsin
Chen, Yung-Sheng
Huang, Yu-Hsuan
Chiou, Chyi-Rong] Natl Taiwan Univ, Sch Forestry & Resource Conservat, Taipei 106, Taiwan
[Lin, Chau-Chih] Taiwan Forestry Res Inst, Div Forestry Protect, Taipei, Taiwan
[Menyailo, Oleg V.] Inst Forest SB RAS, Krasnoyarsk, Russia
Доп.точки доступа:
Cheng, C.H.; Chen, Y.S.; Huang, Y.H.; Chiou, C.R.; Lin, C.C.; Menyailo, O.V.
Рубрики:
SOIL ORGANIC-MATTER
CARBON STORAGE
CLIMATE-CHANGE
MEDITERRANEAN BASIN
SPECIES COMPOSITION
NORTHERN AUSTRALIA
TROPICAL SAVANNAS
GRASS INVASION
BOREAL FOREST
WESTERN US
SOIL ORGANIC-MATTER
CARBON STORAGE
CLIMATE-CHANGE
MEDITERRANEAN BASIN
SPECIES COMPOSITION
NORTHERN AUSTRALIA
TROPICAL SAVANNAS
GRASS INVASION
BOREAL FOREST
WESTERN US
Аннотация: Repeated fires might have different effect on ecosystem carbon storage than a single fire event, but information on repeated fires and their effects on forest ecosystems and carbon storage is scarce. However, changes in climate, vegetation composition, and human activities are expected to make forests more susceptible to fires that recur with relatively high frequency. In this study, the effects of repeated fires on ecosystem carbon and nitrogen stocks were examined along a fire-induced forest/grassland gradient wherein the fire events varied from an unburned forest to repeatedly burned grassland. Results from the study show repeated fires drastically decreased ecosystem carbon and nitrogen stocks along the forest/grassland gradient. The reduction began with the disappearance of living tree biomass, and followed by the loss of soil carbon and nitrogen. Within 4 years of the onset of repeated fires on the unburned forest, the original ecosystem carbon and nitrogen stocks were reduced by 42% and 21%, respectively. Subsequent fires caused cumulative reductions in ecosystem carbon and nitrogen stocks by 68% and 44% from the original ecosystem carbon and nitrogen stocks, respectively. The analyses of carbon budgets calculated by vegetation composition and stable isotopic delta C-13 values indicate that 84% of forest-derived carbon is lost at grassland, whereas the gain of grass-derived carbon only compensates 18% for this loss. Such significant losses in ecosystem carbon and nitrogen stocks suggest that the effects of repeated fires have substantial impacts on ecosystem and soil carbon and nitrogen cycling. Citation: Cheng, C.-H., Y.-S. Chen, Y.-H. Huang, Chiou C.-R., C.-C. Lin, and O. V. Menyailo (2013), Effects of repeated fires on ecosystem C and N stocks along a fire induced forest/grassland gradient, J. Geophys. Res. Biogeosci., 118, 215-225, doi:10.1002/jgrg.20019
WOS,
Scopus,
Полный текст
Держатели документа:
[Cheng, Chih-Hsin
Chen, Yung-Sheng
Huang, Yu-Hsuan
Chiou, Chyi-Rong] Natl Taiwan Univ, Sch Forestry & Resource Conservat, Taipei 106, Taiwan
[Lin, Chau-Chih] Taiwan Forestry Res Inst, Div Forestry Protect, Taipei, Taiwan
[Menyailo, Oleg V.] Inst Forest SB RAS, Krasnoyarsk, Russia
Доп.точки доступа:
Cheng, C.H.; Chen, Y.S.; Huang, Y.H.; Chiou, C.R.; Lin, C.C.; Menyailo, O.V.
The influence of climate and fructification on the inter-annual variability of stem growth and net primary productivity in an old-growth, mixed beech forest
[Text] / M. . Mund [et al.] // Tree Physiol. - 2010. - Vol. 30, Is. 6. - P689-704, DOI 10.1093/treephys/tpq027. - Cited References: 80. - Integrated project CarboEurope-IP, European Commission, Directorate-General Research, Sixth Framework Programme, Priority 1.1.6.3: Global Change and Ecosystem (Contract No. GOCE-CT-2003-505572); Max-Planck-Institute for Biogeochemistry, Jena, Germany.
. - 16. - ISSN 0829-318X
РУБ Forestry
Аннотация: The periodic production of large seed crops by trees (masting) and its interaction with stern growth has long been the objective of tree physiology research. However, very little is known about the effects of masting on stern growth and total net primary productivity (NPP) at the stand scale. This study was conducted in an old-growth, mixed deciduous forest dominated by Fagus sylvatica (L.) and covers the period from 2003 to 2007, which comprised wet, dry and regular years as well as two masts of Fagus and one mast of the co-dominant tree species Fraxinus excelsior (L.) and Acer pseudoplatanus (L.). We combined analyses of weather conditions and stem growth at the tree level (inter- and intra-annual) with fruit, stem and leaf production, and estimates of total NPP at the stand level. Finally, we compared the annual demand of carbon for biomass production with net canopy assimilation (NCA), derived from eddy covariance flux measurements, chamber measurements and modelling. Annual stem growth of Fagus was most favoured by warm periods in spring and that of Fraxinus by high precipitation in June. For stem growth of Acer and for fruit production, no significant relationships with mean weather conditions were found. Intra-annual stem growth of all species was strongly reduced when the relative plant-available water in soil dropped below a threshold of about 60% between May and July. The inter-annual variations of NCA, total NPP and leaf NPP at the stand level were low (mean values 1313, 662 and 168 g C m(-2) year(-1), respectively), while wood and fruit production varied more and contrarily (wood: 169-241 g C m(-2) year(-1); fruits: 21-142 g C m(-2) year(-1)). In all years, an annual surplus of newly assimilated carbon was calculated (on average 100 g C m(-2) year(-1)). The results suggest that stem growth is generally not limited by insufficient carbon resources; only in mast years a short-term carbon shortage may occur in spring. In contrast to common assumption, stem growth alone is not a sufficient proxy for total biomass production or the control of carbon sequestration by weather extremes.
Полный текст,
WOS,
Scopus
Держатели документа:
[Mund, M.
Wirth, C.
Schulze, E. -D.] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kutsch, W. L.] Inst Agr Climate Res, Johann Heinrich von Thunen Inst, D-38116 Braunschweig, Germany
[Kahl, T.] Univ Freiburg, Inst Silviculture, D-79085 Freiburg, Germany
[Knohl, A.] ETH, Inst Plant Sci, CH-8092 Zurich, Switzerland
[Knohl, A.] Univ Gottingen, Busgen Inst, D-37077 Gottingen, Germany
[Skomarkova, M. V.] Inst Forest SB RAS, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Mund, M...; Kutsch, W.L.; Wirth, C...; Kahl, T...; Knohl, A...; Skomarkova, M.V.; Schulze, E.D.
Рубрики:
FAGUS-SYLVATICA L.
EDDY COVARIANCE MEASUREMENTS
EUROPEAN BEECH
DECIDUOUS FOREST
TREE-GROWTH
SOIL-MICROORGANISMS
FRAXINUS-EXCELSIOR
CARBON LIMITATION
CROWN CONDITION
CENTRAL GERMANY
Кл.слова (ненормированные):
Acer pseudoplatanus -- carbon allocation -- carbon balance -- drought -- Fagus sylvatica -- Fraxinus excelsior -- masting -- resource limitation -- stem growth -- unmanaged forest
FAGUS-SYLVATICA L.
EDDY COVARIANCE MEASUREMENTS
EUROPEAN BEECH
DECIDUOUS FOREST
TREE-GROWTH
SOIL-MICROORGANISMS
FRAXINUS-EXCELSIOR
CARBON LIMITATION
CROWN CONDITION
CENTRAL GERMANY
Кл.слова (ненормированные):
Acer pseudoplatanus -- carbon allocation -- carbon balance -- drought -- Fagus sylvatica -- Fraxinus excelsior -- masting -- resource limitation -- stem growth -- unmanaged forest
Аннотация: The periodic production of large seed crops by trees (masting) and its interaction with stern growth has long been the objective of tree physiology research. However, very little is known about the effects of masting on stern growth and total net primary productivity (NPP) at the stand scale. This study was conducted in an old-growth, mixed deciduous forest dominated by Fagus sylvatica (L.) and covers the period from 2003 to 2007, which comprised wet, dry and regular years as well as two masts of Fagus and one mast of the co-dominant tree species Fraxinus excelsior (L.) and Acer pseudoplatanus (L.). We combined analyses of weather conditions and stem growth at the tree level (inter- and intra-annual) with fruit, stem and leaf production, and estimates of total NPP at the stand level. Finally, we compared the annual demand of carbon for biomass production with net canopy assimilation (NCA), derived from eddy covariance flux measurements, chamber measurements and modelling. Annual stem growth of Fagus was most favoured by warm periods in spring and that of Fraxinus by high precipitation in June. For stem growth of Acer and for fruit production, no significant relationships with mean weather conditions were found. Intra-annual stem growth of all species was strongly reduced when the relative plant-available water in soil dropped below a threshold of about 60% between May and July. The inter-annual variations of NCA, total NPP and leaf NPP at the stand level were low (mean values 1313, 662 and 168 g C m(-2) year(-1), respectively), while wood and fruit production varied more and contrarily (wood: 169-241 g C m(-2) year(-1); fruits: 21-142 g C m(-2) year(-1)). In all years, an annual surplus of newly assimilated carbon was calculated (on average 100 g C m(-2) year(-1)). The results suggest that stem growth is generally not limited by insufficient carbon resources; only in mast years a short-term carbon shortage may occur in spring. In contrast to common assumption, stem growth alone is not a sufficient proxy for total biomass production or the control of carbon sequestration by weather extremes.
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Держатели документа:
[Mund, M.
Wirth, C.
Schulze, E. -D.] Max Planck Inst Biogeochem, D-07745 Jena, Germany
[Kutsch, W. L.] Inst Agr Climate Res, Johann Heinrich von Thunen Inst, D-38116 Braunschweig, Germany
[Kahl, T.] Univ Freiburg, Inst Silviculture, D-79085 Freiburg, Germany
[Knohl, A.] ETH, Inst Plant Sci, CH-8092 Zurich, Switzerland
[Knohl, A.] Univ Gottingen, Busgen Inst, D-37077 Gottingen, Germany
[Skomarkova, M. V.] Inst Forest SB RAS, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Mund, M...; Kutsch, W.L.; Wirth, C...; Kahl, T...; Knohl, A...; Skomarkova, M.V.; Schulze, E.D.
The spatial and temporal distribution of fires on Sakhalin Island, Russia
[Text] / V. I. Kharuk, E. S. Kasischke, O. E. Yakubailik // Int. J. Wildland Fire. - 2007. - Vol. 16, Is. 5. - P556-562, DOI 10.1071/WF05009. - Cited References: 14
. - 7. - ISSN 1049-8001
РУБ Forestry
Аннотация: In the 1990s, catastrophic fires affected similar to 8 million ha of forest lands in the Russian Far East, including forests of Sakhalin Island. A study that correlated the spatial distribution of burned area and topographic features (elevation, slope, aspect) was carried out for Sakhalin Island. Burned area information derived from forest inventory maps (1935 to 1990) and satellite imagery (1998) was digitised and entered into a Geographic Information System. The burned area locations were correlated with topographic information; the normalisation procedure allows for analysis of the dependence of the fire scars on landscape features. The analyses show that fires occur primarily on the eastern, south- and north-eastern facing areas; > 90% of fires occur at elevations lower than 300 m, and > 95% occur on slopes < 10 degrees. For the period 1935 to 1998, similar to 54% of the Sakhalin Island forest land territory was burned. From the total area of fire scars, formed from 1935 to 1998, 90.5% occurred owing to single fires, 8.6% of fire scars were the result of burning by two fires, 0.9% of fire scars were from three fires, and 0.03% from four fires. A fire return interval for the study region is similar to 120 years.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Forestry, Krasnoyarsk, Russia
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
Russian Acad Sci, Siberian Branch, Inst Comp Modeling, Krasnoyarsk, Russia
Доп.точки доступа:
Kharuk, V.I.; Kasischke, E.S.; Yakubailik, O.E.
Аннотация: In the 1990s, catastrophic fires affected similar to 8 million ha of forest lands in the Russian Far East, including forests of Sakhalin Island. A study that correlated the spatial distribution of burned area and topographic features (elevation, slope, aspect) was carried out for Sakhalin Island. Burned area information derived from forest inventory maps (1935 to 1990) and satellite imagery (1998) was digitised and entered into a Geographic Information System. The burned area locations were correlated with topographic information; the normalisation procedure allows for analysis of the dependence of the fire scars on landscape features. The analyses show that fires occur primarily on the eastern, south- and north-eastern facing areas; > 90% of fires occur at elevations lower than 300 m, and > 95% occur on slopes < 10 degrees. For the period 1935 to 1998, similar to 54% of the Sakhalin Island forest land territory was burned. From the total area of fire scars, formed from 1935 to 1998, 90.5% occurred owing to single fires, 8.6% of fire scars were the result of burning by two fires, 0.9% of fire scars were from three fires, and 0.03% from four fires. A fire return interval for the study region is similar to 120 years.
WOS,
Scopus
Держатели документа:
Russian Acad Sci, Siberian Branch, Inst Forestry, Krasnoyarsk, Russia
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
Russian Acad Sci, Siberian Branch, Inst Comp Modeling, Krasnoyarsk, Russia
Доп.точки доступа:
Kharuk, V.I.; Kasischke, E.S.; Yakubailik, O.E.
Environmental variation, vegetation distribution, carbon dynamics and water/energy exchange at high latitudes
[Text] / A. D. McGuire [et al.] // J. Veg. Sci. - 2002. - Vol. 13: IGBP Terrestrial Transects Workshop (JUL 12-16, 1999, DARWIN, AUSTRALIA), Is. 3. - P301-314, DOI 10.1111/j.1654-1103.2002.tb02055.x. - Cited References: 69
. - 14. - ISSN 1100-9233
РУБ Plant Sciences + Ecology + Forestry
Аннотация: The responses of high latitude ecosystems to global change involve complex interactions among environmental variables, vegetation distribution, carbon dynamics, and water and energy exchange. These responses may have important consequences for the earth system. In this study, we evaluated how vegetation distribution, carbon stocks and turnover, and water and energy exchange are related to environmental variation spanned by the network of the IGBP high latitude transects. While the most notable feature of the high latitude transects is that they generally span temperature gradients from southern to northern latitudes, there are substantial differences in temperature among the transects. Also, along each transect temperature co-varies with precipitation and photosynthetically active radiation, which are also variable among the transects. Both climate and disturbance interact to influence latitudinal patterns of vegetation and soil carbon storage among the transects, and vegetation distribution appears to interact with climate to determine exchanges of heat and moisture in high latitudes. Despite limitations imposed by the data we assembled, the analyses in this study have taken an important step toward clarifying the complexity of interactions among environmental variables, vegetation distribution, carbon stocks and turnover, and water and energy exchange in high latitude regions. This study reveals the need to conduct coordinated global change studies in high latitudes to further elucidate how interactions among climate, disturbance, and vegetation distribution influence carbon dynamics and water and energy exchange in high latitudes.
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Держатели документа:
Univ Alaska Fairbanks, Alaska Cooperat Fish & Wildlife Res Unit, US Geol Survey, Fairbanks, AK 99775 USA
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Canadian Forest Serv, No Forestry Ctr, Edmonton, AB T6H 3S5, Canada
Monash Univ, Sch Geog & Environm Sci, Clayton, Vic 3800, Australia
Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA
Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA
Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
Far Eastern Forestry Res Inst, Khaborovsk 680030, Russia
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
Hokkaido Univ, Inst Low Temp, Sapporo, Hokkaido 060, Japan
Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706 USA
Univ Alaska Fairbanks, Inst No Engn, Fairbanks, AK 99775 USA
Univ Durham, Environm Res Ctr, Durham DH1 3LE, England
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
McGuire, A.D.; Wirth, C...; Apps, M...; Beringer, J...; Clein, J...; Epstein, H...; Kicklighter, D.W.; Bhatti, J...; Chapin, F.S.; de Groot, B...; Efremov, D...; Eugster, W...; Fukuda, M...; Gower, T...; Hinzman, L...; Huntley, B...; Jia, G.J.; Kasischke, E...; Melillo, J...; Romanovsky, V...; Shvidenko, A...; Vaganov, E...; Walker, D...
Рубрики:
BOREAL FOREST
CLIMATE-CHANGE
ARCTIC TUNDRA
EASTERN SIBERIA
ABOVEGROUND BIOMASS
ENERGY-EXCHANGE
SPECIAL SECTION
PINE FORESTS
SOIL CARBON
ALASKA
Кл.слова (ненормированные):
boreal -- climate -- disturbance -- energy -- gradient -- tundra
BOREAL FOREST
CLIMATE-CHANGE
ARCTIC TUNDRA
EASTERN SIBERIA
ABOVEGROUND BIOMASS
ENERGY-EXCHANGE
SPECIAL SECTION
PINE FORESTS
SOIL CARBON
ALASKA
Кл.слова (ненормированные):
boreal -- climate -- disturbance -- energy -- gradient -- tundra
Аннотация: The responses of high latitude ecosystems to global change involve complex interactions among environmental variables, vegetation distribution, carbon dynamics, and water and energy exchange. These responses may have important consequences for the earth system. In this study, we evaluated how vegetation distribution, carbon stocks and turnover, and water and energy exchange are related to environmental variation spanned by the network of the IGBP high latitude transects. While the most notable feature of the high latitude transects is that they generally span temperature gradients from southern to northern latitudes, there are substantial differences in temperature among the transects. Also, along each transect temperature co-varies with precipitation and photosynthetically active radiation, which are also variable among the transects. Both climate and disturbance interact to influence latitudinal patterns of vegetation and soil carbon storage among the transects, and vegetation distribution appears to interact with climate to determine exchanges of heat and moisture in high latitudes. Despite limitations imposed by the data we assembled, the analyses in this study have taken an important step toward clarifying the complexity of interactions among environmental variables, vegetation distribution, carbon stocks and turnover, and water and energy exchange in high latitude regions. This study reveals the need to conduct coordinated global change studies in high latitudes to further elucidate how interactions among climate, disturbance, and vegetation distribution influence carbon dynamics and water and energy exchange in high latitudes.
Полный текст,
WOS
Держатели документа:
Univ Alaska Fairbanks, Alaska Cooperat Fish & Wildlife Res Unit, US Geol Survey, Fairbanks, AK 99775 USA
Max Planck Inst Biogeochem, D-07701 Jena, Germany
Canadian Forest Serv, No Forestry Ctr, Edmonton, AB T6H 3S5, Canada
Monash Univ, Sch Geog & Environm Sci, Clayton, Vic 3800, Australia
Univ Alaska Fairbanks, Inst Arctic Biol, Fairbanks, AK 99775 USA
Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA
Marine Biol Lab, Ctr Ecosyst, Woods Hole, MA 02543 USA
Far Eastern Forestry Res Inst, Khaborovsk 680030, Russia
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
Hokkaido Univ, Inst Low Temp, Sapporo, Hokkaido 060, Japan
Univ Wisconsin, Dept Forest Ecol & Management, Madison, WI 53706 USA
Univ Alaska Fairbanks, Inst No Engn, Fairbanks, AK 99775 USA
Univ Durham, Environm Res Ctr, Durham DH1 3LE, England
Univ Maryland, Dept Geog, College Pk, MD 20742 USA
Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA
Int Inst Appl Syst Anal, A-2361 Laxenburg, Austria
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
McGuire, A.D.; Wirth, C...; Apps, M...; Beringer, J...; Clein, J...; Epstein, H...; Kicklighter, D.W.; Bhatti, J...; Chapin, F.S.; de Groot, B...; Efremov, D...; Eugster, W...; Fukuda, M...; Gower, T...; Hinzman, L...; Huntley, B...; Jia, G.J.; Kasischke, E...; Melillo, J...; Romanovsky, V...; Shvidenko, A...; Vaganov, E...; Walker, D...
Low-frequency temperature variations from a northern tree ring density network
[Text] / K. R. Briffa [et al.] // J. Geophys. Res.-Atmos. - 2001. - Vol. 106, Is. D3. - P2929-2941, DOI 10.1029/2000JD900617. - Cited References: 25
. - 13. - ISSN 0747-7309
РУБ Meteorology & Atmospheric Sciences
Аннотация: We describe new reconstructions of northern extratropical summer temperatures for nine subcontinental-scale regions and a composite series representing quasi "Northern Hemi sphere" temperature change over the last 600 years. These series are based on tree ring density data that have been processed using a novel statistical technique (age band decomposition) designed to preserve greater long-timescale variability than in previous analyses. We provide time-dependent and timescale-dependent uncertainty estimates for all of the reconstructions. The new regional estimates are generally cooler in almost all precalibration periods, compared to estimates obtained using earlier processing methods, particularly during the 17th century. One exception is the reconstruction for northern Siberia, where 15th century summers are now estimated to be warmer than those observed in the 20th century. In producing a new Northern Hemisphere series we demonstrate the sensitivity of the results to the methodology used once the number of regions with data, and the reliability of each regional series, begins to decrease. We compare our new hemisphere series to other published large-regional temperature histories, most of which lie within the lo confidence band of our estimates over most of the last 600 years. The 20th century is clearly shown by all of the palaeoseries composites to be the warmest during this period.
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WOS,
Scopus
Держатели документа:
Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland
Russian Acad Sci, Inst Plant & Anim Ecol, Ural Branch, Ekaterinburg 620144, Russia
Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Briffa, K.R.; Osborn, T.J.; Schweingruber, F.H.; Harris, I.C.; Jones, P.D.; Shiyatov, S.G.; Vaganov, E.A.
Аннотация: We describe new reconstructions of northern extratropical summer temperatures for nine subcontinental-scale regions and a composite series representing quasi "Northern Hemi sphere" temperature change over the last 600 years. These series are based on tree ring density data that have been processed using a novel statistical technique (age band decomposition) designed to preserve greater long-timescale variability than in previous analyses. We provide time-dependent and timescale-dependent uncertainty estimates for all of the reconstructions. The new regional estimates are generally cooler in almost all precalibration periods, compared to estimates obtained using earlier processing methods, particularly during the 17th century. One exception is the reconstruction for northern Siberia, where 15th century summers are now estimated to be warmer than those observed in the 20th century. In producing a new Northern Hemisphere series we demonstrate the sensitivity of the results to the methodology used once the number of regions with data, and the reliability of each regional series, begins to decrease. We compare our new hemisphere series to other published large-regional temperature histories, most of which lie within the lo confidence band of our estimates over most of the last 600 years. The 20th century is clearly shown by all of the palaeoseries composites to be the warmest during this period.
Полный текст,
WOS,
Scopus
Держатели документа:
Univ E Anglia, Climat Res Unit, Norwich NR4 7TJ, Norfolk, England
Swiss Fed Inst Forest Snow & Landscape Res, CH-8903 Birmensdorf, Switzerland
Russian Acad Sci, Inst Plant & Anim Ecol, Ural Branch, Ekaterinburg 620144, Russia
Inst Forest, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Briffa, K.R.; Osborn, T.J.; Schweingruber, F.H.; Harris, I.C.; Jones, P.D.; Shiyatov, S.G.; Vaganov, E.A.
Land-atmosphere energy exchange in Arctic tundra and boreal forest: available data and feedbacks to climate
[Text] / W. . Eugster [et al.] // Glob. Change Biol. - 2000. - Vol. 6. - P84-115, DOI 10.1046/j.1365-2486.2000.06015.x. - Cited References: 132
. - 32. - ISSN 1354-1013
РУБ Biodiversity Conservation + Ecology + Environmental Sciences
Аннотация: This paper summarizes and analyses available data on the surface energy balance of Arctic tundra and boreal forest. The complex interactions between ecosystems and their surface energy balance are also examined, including climatically induced shifts in ecosystem type that might amplify or reduce the effects of potential climatic change. High latitudes are characterized by large annual changes in solar input. Albedo decreases strongly from winter, when the surface is snow-covered, to summer, especially in nonforested regions such as Arctic tundra and boreal wetlands. Evapotranspiration (Q(E)) of high-latitude ecosystems is less than from a freely evaporating surface and decreases late in the season, when soil moisture declines, indicating stomatal control over Q(E), particularly in evergreen forests. Evergreen conifer forests have a canopy conductance half that of deciduous forests and consequently lower Q(E) and higher sensible heat flux (Q(H)), There is a broad overlap in energy partitioning between Arctic and boreal ecosystems, although Arctic ecosystems and light taiga generally have higher ground heat flux because there is less leaf and stem area to shade the ground surface, and the thermal gradient from the surface to permafrost is steeper. Permafrost creates a strong heat sink in summer that reduces surface temperature and therefore heat flux to the atmosphere. Loss of permafrost would therefore amplify climatic warming. If warming caused an increase in productivity and leaf area, or fire caused a shift from evergreen to deciduous forest, this would increase Q(E) and reduce Q(H). Potential future shifts in vegetation would have varying climate feedbacks, with largest effects caused by shifts from boreal conifer to shrubland or deciduous forest (or vice versa) and from Arctic coastal to wet tundra. An increase of logging activity in the boreal forests appears to reduce Q(E) by roughly 50% with little change in Q(H), while the ground heat flux is strongly enhanced.
Полный текст,
WOS,
Scopus
Держатели документа:
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
McMaster Univ, Sch Geog & Geol, Hamilton, ON L8S 4K1, Canada
Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA
Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA
NOAA, ERL, ATDD, Oak Ridge, TN 37831 USA
Natl Ctr Atmospher Res, Boulder, CO 80307 USA
Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Eugster, W...; Rouse, W.R.; Pielke, R.A.; McFadden, J.P.; Baldocchi, D.D.; Kittel, TGF; Chapin, F.S.; Liston, G.E.; Vidale, P.L.; Vaganov, E...; Chambers, S...
Рубрики:
WILLOW BIRCH FOREST
BLACK SPRUCE FOREST
HUDSON-BAY LOWLANDS
WATER-BALANCE
EASTERN SIBERIA
CARBON-DIOXIDE
EDDY-CORRELATION
NET-RADIATION
PINE FOREST
SEASONAL-VARIATION
Кл.слова (ненормированные):
Arctic tundra -- boreal forest -- circumpolar high-latitudes -- climate feedbacks -- eddy covariance flux data -- surface energy balance
WILLOW BIRCH FOREST
BLACK SPRUCE FOREST
HUDSON-BAY LOWLANDS
WATER-BALANCE
EASTERN SIBERIA
CARBON-DIOXIDE
EDDY-CORRELATION
NET-RADIATION
PINE FOREST
SEASONAL-VARIATION
Кл.слова (ненормированные):
Arctic tundra -- boreal forest -- circumpolar high-latitudes -- climate feedbacks -- eddy covariance flux data -- surface energy balance
Аннотация: This paper summarizes and analyses available data on the surface energy balance of Arctic tundra and boreal forest. The complex interactions between ecosystems and their surface energy balance are also examined, including climatically induced shifts in ecosystem type that might amplify or reduce the effects of potential climatic change. High latitudes are characterized by large annual changes in solar input. Albedo decreases strongly from winter, when the surface is snow-covered, to summer, especially in nonforested regions such as Arctic tundra and boreal wetlands. Evapotranspiration (Q(E)) of high-latitude ecosystems is less than from a freely evaporating surface and decreases late in the season, when soil moisture declines, indicating stomatal control over Q(E), particularly in evergreen forests. Evergreen conifer forests have a canopy conductance half that of deciduous forests and consequently lower Q(E) and higher sensible heat flux (Q(H)), There is a broad overlap in energy partitioning between Arctic and boreal ecosystems, although Arctic ecosystems and light taiga generally have higher ground heat flux because there is less leaf and stem area to shade the ground surface, and the thermal gradient from the surface to permafrost is steeper. Permafrost creates a strong heat sink in summer that reduces surface temperature and therefore heat flux to the atmosphere. Loss of permafrost would therefore amplify climatic warming. If warming caused an increase in productivity and leaf area, or fire caused a shift from evergreen to deciduous forest, this would increase Q(E) and reduce Q(H). Potential future shifts in vegetation would have varying climate feedbacks, with largest effects caused by shifts from boreal conifer to shrubland or deciduous forest (or vice versa) and from Arctic coastal to wet tundra. An increase of logging activity in the boreal forests appears to reduce Q(E) by roughly 50% with little change in Q(H), while the ground heat flux is strongly enhanced.
Полный текст,
WOS,
Scopus
Держатели документа:
Univ Bern, Inst Geog, CH-3012 Bern, Switzerland
McMaster Univ, Sch Geog & Geol, Hamilton, ON L8S 4K1, Canada
Colorado State Univ, Dept Atmospher Sci, Ft Collins, CO 80523 USA
Univ Calif Berkeley, Dept Integrat Biol, Berkeley, CA 94720 USA
NOAA, ERL, ATDD, Oak Ridge, TN 37831 USA
Natl Ctr Atmospher Res, Boulder, CO 80307 USA
Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99775 USA
Russian Acad Sci, Inst Forestry, Krasnoyarsk 660036, Russia
Доп.точки доступа:
Eugster, W...; Rouse, W.R.; Pielke, R.A.; McFadden, J.P.; Baldocchi, D.D.; Kittel, TGF; Chapin, F.S.; Liston, G.E.; Vidale, P.L.; Vaganov, E...; Chambers, S...
VARIATION AMONG AND WITHIN MOUNTAIN BIRCH TREES IN FOLIAGE PHENOLS, CARBOHYDRATES, AND AMINO-ACIDS, AND IN GROWTH OF EPIRRITA-AUTUMNATA LARVAE
[Text] / J. . SUOMELA, V. . OSSIPOV, E. . HAUKIOJA // J. Chem. Ecol. - 1995. - Vol. 21, Is. 10. - P1421-1446, DOI 10.1007/BF02035143. - Cited References: 81
. - 26. - ISSN 0098-0331
РУБ Biochemistry & Molecular Biology + Ecology
Аннотация: Leaf quality of the mountain birch (Betula pubescens ssp. tortuosa) for herbivores was studied at several hierarchical levels: among trees, among ramets within trees, among branches within ramets, and among short shoots within branches. The experimental units at each level were chosen randomly. The indices of leaf quality were the growth rate of the larvae of a geometrid, Epirrita autumnata, and certain biochemical traits of the leaves (total phenolics and individual phenolic compounds, total carbohydrates and individual sugars, free and protein-bound amino acids). We also discuss relationships between larval growth rate and biochemical foliage traits. Larval growth rates during two successive years correlated positively at the level of tree, the ramet, and the branch, indicating that the relationships in leaf quality remained constant between seasons both among and within trees. The distribution of variation at different hierarchical levels depended on the trait in question. In the case of larval growth rate, ramets and short shoots accounted for most of the explained variation. In the case of biochemical compounds, trees accounted for most of the variance in the content of total phenolics and individual low-molecular-weight phenolics. In the content of carbohydrates (total carbohydrates, starch, fructose, glucose, and sucrose) and amino acids, variation among branches was generally larger than variation among trees. Variation among ramets was low for most compounds. No single leaf trait played a paramount role in larval growth. Secondary compounds, represented by phenolic compounds, or primary metabolites, particularly sugars, may both be important in determining the suitability of birch leaves for larvae. If phenols are causally more important, genet-specific analyses of foliage chemistry are needed. If sugars are of primary importance, within-genet sampling and analysis of foliage chemistry are necessary.
Полный текст,
WOS
Держатели документа:
TURKU UNIV,KEVO SUBARCTIC RES STN,SF-20500 TURKU,FINLAND
INST FOREST,KRASNOYARSK 660036,RUSSIA
Доп.точки доступа:
SUOMELA, J...; OSSIPOV, V...; HAUKIOJA, E...
Рубрики:
DELAYED INDUCIBLE RESISTANCE
LEAF-CHEWING INSECT
MODULAR ORGANISMS
BETULA-PUBESCENS
NUTRITIONAL ECOLOGY
NITROGEN-CONTENT
PLANTS
PERFORMANCE
HERBIVORY
GEOMETRIDAE
Кл.слова (ненормированные):
AMINO ACIDS -- BERTULA PUBESCENS SSP TORTUOSA -- CARBOHYDRATES -- EPIRRITA AUTUMNATA -- LARVAL GROWTH -- LEAF BIOCHEMICAL TRAITS -- PHENOLICS -- SUGARS -- WITHIN-TREE VARIATION
DELAYED INDUCIBLE RESISTANCE
LEAF-CHEWING INSECT
MODULAR ORGANISMS
BETULA-PUBESCENS
NUTRITIONAL ECOLOGY
NITROGEN-CONTENT
PLANTS
PERFORMANCE
HERBIVORY
GEOMETRIDAE
Кл.слова (ненормированные):
AMINO ACIDS -- BERTULA PUBESCENS SSP TORTUOSA -- CARBOHYDRATES -- EPIRRITA AUTUMNATA -- LARVAL GROWTH -- LEAF BIOCHEMICAL TRAITS -- PHENOLICS -- SUGARS -- WITHIN-TREE VARIATION
Аннотация: Leaf quality of the mountain birch (Betula pubescens ssp. tortuosa) for herbivores was studied at several hierarchical levels: among trees, among ramets within trees, among branches within ramets, and among short shoots within branches. The experimental units at each level were chosen randomly. The indices of leaf quality were the growth rate of the larvae of a geometrid, Epirrita autumnata, and certain biochemical traits of the leaves (total phenolics and individual phenolic compounds, total carbohydrates and individual sugars, free and protein-bound amino acids). We also discuss relationships between larval growth rate and biochemical foliage traits. Larval growth rates during two successive years correlated positively at the level of tree, the ramet, and the branch, indicating that the relationships in leaf quality remained constant between seasons both among and within trees. The distribution of variation at different hierarchical levels depended on the trait in question. In the case of larval growth rate, ramets and short shoots accounted for most of the explained variation. In the case of biochemical compounds, trees accounted for most of the variance in the content of total phenolics and individual low-molecular-weight phenolics. In the content of carbohydrates (total carbohydrates, starch, fructose, glucose, and sucrose) and amino acids, variation among branches was generally larger than variation among trees. Variation among ramets was low for most compounds. No single leaf trait played a paramount role in larval growth. Secondary compounds, represented by phenolic compounds, or primary metabolites, particularly sugars, may both be important in determining the suitability of birch leaves for larvae. If phenols are causally more important, genet-specific analyses of foliage chemistry are needed. If sugars are of primary importance, within-genet sampling and analysis of foliage chemistry are necessary.
Полный текст,
WOS
Держатели документа:
TURKU UNIV,KEVO SUBARCTIC RES STN,SF-20500 TURKU,FINLAND
INST FOREST,KRASNOYARSK 660036,RUSSIA
Доп.точки доступа:
SUOMELA, J...; OSSIPOV, V...; HAUKIOJA, E...
Is the 20th century warming unprecedented in the Siberian north?
/ O. V. Sidorova [et al.] // Quaternary Science Reviews. - 2013. - Vol. 73. - P93-102, DOI 10.1016/j.quascirev.2013.05.015
. - ISSN 0277-3791
Кл.слова (ненормированные):
Ice cores -- Pollen data -- Stable carbon and oxygen isotopes -- Taimyr -- Tree-rings -- Warming -- Ice core -- Pollen data -- Stable carbon -- Taimyr -- Tree rings -- Warming -- Carbon -- Cellulose -- Forestry -- Ice -- Isotopes -- Lakes -- Lasers -- Oxygen -- Trees (mathematics) -- carbon isotope -- coniferous forest -- data set -- dendrochronology -- Holocene -- ice core -- oxygen isotope -- paleoclimate -- paleoecology -- paleoenvironment -- palynology -- permafrost -- reconstruction -- stable isotope -- tree ring -- twentieth century -- warming -- Carbon -- Cellulose -- Forestry -- Ice -- Isotopes -- Lakes -- Lasers -- Oxygen -- Rings -- Trees -- Krasnoyarsk [Russian Federation] -- Lama Lake -- Russian Federation -- Siberia
Аннотация: To answer the question "Has the recent warming no analogues in the Siberian north?" we analyzed larch tree samples (. Larix gmelinii Rupr.) from permafrost zone in the eastern Taimyr (TAY) (72В°N, 102В°E) using tree-ring and stable isotope analyses for the Climatic Optimum Period (COP) 4111-3806 BC and Medieval Warm Period (MWP) 917-1150 AD, in comparison to the recent period (RP) 1791-2008 AD.We developed a description of the climatic and environmental changes in the eastern Taimyr using tree-ring width and stable isotope (?13C, ?18O) data based on statistical verification of the relationships to climatic parameters (temperature and precipitation).Additionally, we compared our new tree-ring and stable isotope data sets with earlier published July temperature and precipitation reconstructions inferred from pollen data of the Lama Lake, Taimyr Peninsula, ?18O ice core data from Akademii Nauk ice cap on Severnaya Zemlya (SZ) and ?18O ice core data from Greenland (GISP2), as well as tree-ring width and stable carbon and oxygen isotope data from northeastern Yakutia (YAK).We found that the COP in TAY was warmer and drier compared to the MWP but rather similar to the RP. Our results indicate that the MWP in TAY started earlier and was wetter than in YAK. July precipitation reconstructions obtained from pollen data of the Lama Lake, oxygen isotope data from SZ and our carbon isotopes in tree cellulose agree well and indicate wetter climate conditions during the MWP.Consistent large-scale patterns were reflected in significant links between oxygen isotope data in tree cellulose from TAY and YAK, and oxygen isotope data from SZ and GISP2 during the MWP and the RP.Finally, we showed that the recent warming is not unprecedented in the Siberian north. Similar climate conditions were recorded by tree-rings, stable isotopes, pollen, and ice core data 6000 years ago. В© 2013 Elsevier Ltd.
Scopus,
WOS,
Полный текст
Держатели документа:
Paul Scherrer Institute, 5232 Villigen, Switzerland
V.N. Sukachev Institute of Forest SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russian Federation
Institute of Geology and Minerology, University of Koeln, 50674 Koln, Germany
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, 14473 Potsdam, Germany
Доп.точки доступа:
Sidorova, O.V.; Saurer, M.; Andreev, A.; Fritzsche, D.; Opel, T.; Naurzbaev, M.M.; Siegwolf, R.
Кл.слова (ненормированные):
Ice cores -- Pollen data -- Stable carbon and oxygen isotopes -- Taimyr -- Tree-rings -- Warming -- Ice core -- Pollen data -- Stable carbon -- Taimyr -- Tree rings -- Warming -- Carbon -- Cellulose -- Forestry -- Ice -- Isotopes -- Lakes -- Lasers -- Oxygen -- Trees (mathematics) -- carbon isotope -- coniferous forest -- data set -- dendrochronology -- Holocene -- ice core -- oxygen isotope -- paleoclimate -- paleoecology -- paleoenvironment -- palynology -- permafrost -- reconstruction -- stable isotope -- tree ring -- twentieth century -- warming -- Carbon -- Cellulose -- Forestry -- Ice -- Isotopes -- Lakes -- Lasers -- Oxygen -- Rings -- Trees -- Krasnoyarsk [Russian Federation] -- Lama Lake -- Russian Federation -- Siberia
Аннотация: To answer the question "Has the recent warming no analogues in the Siberian north?" we analyzed larch tree samples (. Larix gmelinii Rupr.) from permafrost zone in the eastern Taimyr (TAY) (72В°N, 102В°E) using tree-ring and stable isotope analyses for the Climatic Optimum Period (COP) 4111-3806 BC and Medieval Warm Period (MWP) 917-1150 AD, in comparison to the recent period (RP) 1791-2008 AD.We developed a description of the climatic and environmental changes in the eastern Taimyr using tree-ring width and stable isotope (?13C, ?18O) data based on statistical verification of the relationships to climatic parameters (temperature and precipitation).Additionally, we compared our new tree-ring and stable isotope data sets with earlier published July temperature and precipitation reconstructions inferred from pollen data of the Lama Lake, Taimyr Peninsula, ?18O ice core data from Akademii Nauk ice cap on Severnaya Zemlya (SZ) and ?18O ice core data from Greenland (GISP2), as well as tree-ring width and stable carbon and oxygen isotope data from northeastern Yakutia (YAK).We found that the COP in TAY was warmer and drier compared to the MWP but rather similar to the RP. Our results indicate that the MWP in TAY started earlier and was wetter than in YAK. July precipitation reconstructions obtained from pollen data of the Lama Lake, oxygen isotope data from SZ and our carbon isotopes in tree cellulose agree well and indicate wetter climate conditions during the MWP.Consistent large-scale patterns were reflected in significant links between oxygen isotope data in tree cellulose from TAY and YAK, and oxygen isotope data from SZ and GISP2 during the MWP and the RP.Finally, we showed that the recent warming is not unprecedented in the Siberian north. Similar climate conditions were recorded by tree-rings, stable isotopes, pollen, and ice core data 6000 years ago. В© 2013 Elsevier Ltd.
Scopus,
WOS,
Полный текст
Держатели документа:
Paul Scherrer Institute, 5232 Villigen, Switzerland
V.N. Sukachev Institute of Forest SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russian Federation
Institute of Geology and Minerology, University of Koeln, 50674 Koln, Germany
Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Research Unit Potsdam, 14473 Potsdam, Germany
Доп.точки доступа:
Sidorova, O.V.; Saurer, M.; Andreev, A.; Fritzsche, D.; Opel, T.; Naurzbaev, M.M.; Siegwolf, R.
Tree-line structure and dynamics at the northern limit of the larch forest: Anabar Plateau, Siberia, Russia
/ V. I. Kharuk [et al.] // Arctic, Antarctic, and Alpine Research. - 2013. - Vol. 45, Is. 4. - P526-537, DOI 10.1657/1938-4246-45.4.526
. - ISSN 1523-0430
Аннотация: The goal of the study was to provide an analysis of climate impact before, during, and after the Little Ice Age (LIA) on the larch (Larix gmelinii) tree line at the northern extreme of Siberian forests. Recent decadal climate change impacts on the tree line, regeneration abundance, and age structure were analyzed. The location of the study area was within the forest-tundra ecotone (elevation range 170-450 m) in the Anabar Plateau, northern Siberia. Field studies were conducted along elevational transects. Tree natality/mortality and radial increment were determined based on dendrochronology analyses. Tree morphology, number of living and subfossil trees, regeneration abundance, and age structure were studied. Locations of pre-LIA, LIA, and post-LIA tree lines and refugia boundaries were established. Long-term climate variables and drought index were included in the analysis. It was found that tree mortality from the 16th century through the beginning of the 19th century caused a downward tree line recession. Sparse larch stands experienced deforestation, transforming into tundra with isolated relict trees. The maximum tree mortality and radial growth decrease were observed to have occurred at the beginning of 18th century. Now larch, at its northern boundary in Siberia, is migrating into tundra areas. Upward tree migration was induced by warming in the middle of the 19th century. Refugia played an important role in repopulation of the forest-tundra ecotone by providing a seed source and shelter for recruitment of larch regeneration. Currently this ecotone is being repopulated mainly by tree cohorts that were established after the 1930s. The last two decades of warming did not result in an acceleration of regeneration recruitment because of increased drought conditions. The regeneration line reached (but did not exceed) the pre-LIA tree line location, although contemporary tree heights and stand densities are comparatively lower than in the pre-LIA period. The mean rate of tree line upward migration has been about 0.35 m yr-1 (with a range of 0.21-0.58), which translates to a tree line response to temperature of about 55 m C-1.
Scopus,
WOS
Держатели документа:
V. N. Sukachev Institute of Forest, Krasnoyarsk 660036, Russian Federation
Goddard Space Flight Center, NASA, Code 618, Greenbelt, MD 20771, United States
Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Oskorbin, P.A.; Dvinskaya, M.L.; Ovchinnikov, D.V.
Аннотация: The goal of the study was to provide an analysis of climate impact before, during, and after the Little Ice Age (LIA) on the larch (Larix gmelinii) tree line at the northern extreme of Siberian forests. Recent decadal climate change impacts on the tree line, regeneration abundance, and age structure were analyzed. The location of the study area was within the forest-tundra ecotone (elevation range 170-450 m) in the Anabar Plateau, northern Siberia. Field studies were conducted along elevational transects. Tree natality/mortality and radial increment were determined based on dendrochronology analyses. Tree morphology, number of living and subfossil trees, regeneration abundance, and age structure were studied. Locations of pre-LIA, LIA, and post-LIA tree lines and refugia boundaries were established. Long-term climate variables and drought index were included in the analysis. It was found that tree mortality from the 16th century through the beginning of the 19th century caused a downward tree line recession. Sparse larch stands experienced deforestation, transforming into tundra with isolated relict trees. The maximum tree mortality and radial growth decrease were observed to have occurred at the beginning of 18th century. Now larch, at its northern boundary in Siberia, is migrating into tundra areas. Upward tree migration was induced by warming in the middle of the 19th century. Refugia played an important role in repopulation of the forest-tundra ecotone by providing a seed source and shelter for recruitment of larch regeneration. Currently this ecotone is being repopulated mainly by tree cohorts that were established after the 1930s. The last two decades of warming did not result in an acceleration of regeneration recruitment because of increased drought conditions. The regeneration line reached (but did not exceed) the pre-LIA tree line location, although contemporary tree heights and stand densities are comparatively lower than in the pre-LIA period. The mean rate of tree line upward migration has been about 0.35 m yr-1 (with a range of 0.21-0.58), which translates to a tree line response to temperature of about 55 m C-1.
Scopus,
WOS
Держатели документа:
V. N. Sukachev Institute of Forest, Krasnoyarsk 660036, Russian Federation
Goddard Space Flight Center, NASA, Code 618, Greenbelt, MD 20771, United States
Доп.точки доступа:
Kharuk, V.I.; Ranson, K.J.; Im, S.T.; Oskorbin, P.A.; Dvinskaya, M.L.; Ovchinnikov, D.V.
1929-YEAR TREE-RING CHRONOLOGY FOR THE ALTAI-SAYAN REGION (WESTERN TUVA)
/ V. S. Myglan [et al.] // Archaeology, Ethnology and Anthropology of Eurasia. - 2008. - Vol. 36, Is. 4. - P25-31, DOI 10.1016/j.aeae.2009.03.003
. - ISSN 1563-0110
Аннотация: The current paper presents a new 1929-year tree-ring chronology for the Altai-Sayan region (Western Tuva) based on analyses of wood material from living trees and trunk remains of Siberian larch (Larix sibirica Ldb) from the upper treeline (2400 m asl). The correlations between tree-ring indices and meteorological data suggest that maximum effect on radial growth is produced by temperatures in June and July. This makes it possible to use the resulting chronology for early summer temperature reconstructions in the Altai-Sayan region. In respect to archaeology, a chronology of this length provides the opportunity of dating ancient wood samples, i.e. for exact definition of the calendar dates of the archaeological objects in the relevant territory over the entire period of the chronology. В© 2009.
Scopus
Держатели документа:
Siberian Federal University, Svobodny Pr. 79, Krasnoyarsk, 660041, Russian Federation
Tuvan State University, Lenina 36, Kyzyl, Russian Federation
V.N. Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Myglan, V.S.; Oidupaa, O.C.; Kirdyanov, A.V.; Vaganov, E.A.
Аннотация: The current paper presents a new 1929-year tree-ring chronology for the Altai-Sayan region (Western Tuva) based on analyses of wood material from living trees and trunk remains of Siberian larch (Larix sibirica Ldb) from the upper treeline (2400 m asl). The correlations between tree-ring indices and meteorological data suggest that maximum effect on radial growth is produced by temperatures in June and July. This makes it possible to use the resulting chronology for early summer temperature reconstructions in the Altai-Sayan region. In respect to archaeology, a chronology of this length provides the opportunity of dating ancient wood samples, i.e. for exact definition of the calendar dates of the archaeological objects in the relevant territory over the entire period of the chronology. В© 2009.
Scopus
Держатели документа:
Siberian Federal University, Svobodny Pr. 79, Krasnoyarsk, 660041, Russian Federation
Tuvan State University, Lenina 36, Kyzyl, Russian Federation
V.N. Sukachev Institute of Forest, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk, 660036, Russian Federation
Доп.точки доступа:
Myglan, V.S.; Oidupaa, O.C.; Kirdyanov, A.V.; Vaganov, E.A.